CN106443348A - Power transmission line fault travelling wave fault location automatic correction method - Google Patents
Power transmission line fault travelling wave fault location automatic correction method Download PDFInfo
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- CN106443348A CN106443348A CN201610886431.1A CN201610886431A CN106443348A CN 106443348 A CN106443348 A CN 106443348A CN 201610886431 A CN201610886431 A CN 201610886431A CN 106443348 A CN106443348 A CN 106443348A
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- Prior art keywords
- fault
- transmission line
- frequency component
- time
- background processor
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/08—Locating faults in cables, transmission lines, or networks
- G01R31/081—Locating faults in cables, transmission lines, or networks according to type of conductors
- G01R31/085—Locating faults in cables, transmission lines, or networks according to type of conductors in power transmission or distribution lines, e.g. overhead
Abstract
The invention provides a power transmission line fault travelling wave fault location automatic correction method and belongs to the technical field of electric power system line protection. The method is characterized in that the method comprises the following steps: a) a travelling wave fault location device starts according to a start flow; b) a background processor divides fault transient information into different frequency components according to frequency bands of the fault transient information; c) the background processor corrects time of signals at the two ends; d) the background processor calibrates wave head start time of each frequency component; e) the background processor calculates fault distance corresponding to each frequency component; and f) the background processor obtains a line fault location result. According to the power transmission line fault travelling wave fault location automatic correction method, power transmission line fault location precision is improved by utilizing line propagation characteristic difference of the frequency components in fault signals obtained after a power transmission line has fault.
Description
Technical field
The travelling wave ranging auto-correction method of a kind of transmission line malfunction, belongs to circuit on power system resist technology field.
Background technology
Transmission line malfunction travelling wave ranging technology, when transmission line of electricity breaks down, can be quickly carried out breakdown judge,
Survey calculates fault distance, and guide line staff quickly searches trouble point, repairs fault, recovers the operation of transmission line of electricity,
Reduce the economic loss causing because of fault stoppage in transit, provide technical support to the safe and stable operation of power system.Current row ripple is surveyed
It is widely applied in terms of power system transmission line fault localization away from technology, achieve good effect.
But being limited by travelling wave ranging know-why and on-the-spot service condition affecting, existing travelling wave ranging technology is using
Plant and there is also some places not fully up to expectations, particularly carry out having time error to exceed the error amount of regulation during fault localization, give
The lookup of fault and positioning bring some deleterious effects.
The traveling wave ranging device being used at present, all uses the high frequency fault signal after transmission line malfunction, its signal band
Wide general from 1KHz to 500KHz, when real work, only judge the wave head initial time after all Signal averaging, then basis
Line characteristic determines wave velocity, utilizes wave velocity, total track length and two ends wave head time to calculate fault distance.Due to this signal
For the superposition of component each in broadband signal, and the wave velocity of each component, attenuation characteristic are different, thus result in initial time
Inaccurate so that circuit range error is bigger.
Content of the invention
The technical problem to be solved in the present invention is：Overcome the deficiencies in the prior art, provide one to utilize transmission line malfunction
The property difference of each frequency component propagation characteristic on the line in rear fault-signal, to improve measuring distance of transmission line fault precision
The travelling wave ranging auto-correction method of transmission line malfunction.
The technical solution adopted for the present invention to solve the technical problems is：The automatic school of travelling wave ranging of this transmission line malfunction
Correction method, it is characterised in that：Comprise the steps：
Step a, traveling wave ranging device starts according to Booting sequence, and is uploaded to the fault transient information of transmission line of electricity at backstage
Reason device；
Step b, background processor receives the transmission line malfunction transient information that the traveling wave ranging device at trouble point two ends uploads
After, according to the frequency range of fault transient information, fault transient information is divided into different frequency components；
By fault transient information is divided into different frequency components by the frequency range of fault transient information so that fault transient travelling wave
Both-end distance measuring result is accurately corrected by wave distortion and the difference of transmission speed that middle different frequency causes due to frequency dispersion,
Thus eliminate owing to the wave head time judges range error that is inaccurate and that introduce.
Step c, background processor is according to the different frequency component obtaining in step b, and according to the biography of each frequency component
Defeated parameter and time parameter, be corrected to the time of two end signals；
By the difference to frequency component spread speed on the line each after transmission line malfunction, analyze in the fault-signal of two ends, road
The otherness of each frequency component arrival time, comprehensive each frequency component arrival time, carries out accurately same to the time at fault two ends
Step.
Step d, background processor is according to the time of two end signals after correction in step c, the wave head to each frequency component
Initial time is demarcated；
By the difference to component attenuation characteristic on the line variant after transmission line malfunction, the component to different frequency respectively
Waveform individually analyzes judgement, identifies the initial time of fault waveform.
Step e, background processor is according in time of two end signals after the correction obtaining in step c and step d
The calibrated wave head initial time arriving, the simultaneously spread speed in transmission line of electricity according to total track length and each frequency component, meter
The fault distance of corresponding each frequency component at calculation；
Step f, background processor draws line fault range measurement.
Preferably, the flow startup described in step a is：When line fault, the row at trouble point two ends on transmission line of electricity
Wave ranging device carries out fault transient intelligence sample；After fault terminates, the traveling wave ranging device at trouble point two ends will each be adopted
The fault message that sample obtains uploads, and is uploaded in same background processor.
Preferably, when carrying out described fault transient intelligence sample, sample frequency is more than 1000kHz.
Preferably, the transmission parameter described in step c is that each frequency component calculates its transmission speed on transmission line of electricity
And the transmission time.
Preferably, the time parameter described in step c is the initial time label of fault transient information and each frequency component
Arrival time.
Compared with prior art, the present invention is had an advantageous effect in that：
1st, in the travelling wave ranging auto-correction method of this transmission line malfunction, utilize after transmission line malfunction each in fault-signal
The property difference of frequency component propagation characteristic on the line, to improve measuring distance of transmission line fault precision.
2nd, by fault transient information is divided into different frequency components by the frequency range of fault transient information so that fault is temporary
Wave distortion and the difference of transmission speed that in state row ripple, different frequency causes due to frequency dispersion carry out essence to both-end distance measuring result
Really correction, thus eliminate owing to the wave head time judges range error that is inaccurate and that introduce.
3rd, by the difference to frequency component spread speed on the line each after transmission line malfunction, two ends, road fault is analyzed
The otherness of each frequency component arrival time in signal, comprehensive each frequency component arrival time, is carried out to the time at fault two ends
Precise synchronization.
4th, by the difference to component attenuation characteristic on the line variant after transmission line malfunction, respectively to different frequency
Component waveform individually analyze judgement, identify the initial time of fault waveform.
Brief description
Fig. 1 is the travelling wave ranging auto-correction method flow chart of transmission line malfunction.
Detailed description of the invention
Fig. 1 is highly preferred embodiment of the present invention, and 1 the present invention will be further described below in conjunction with the accompanying drawings.
The travelling wave ranging auto-correction method of a kind of transmission line malfunction, comprises the steps,
Step 1001：Start；
Proceed by the travelling wave ranging auto-correction method of transmission line malfunction.
Step 1002, traveling wave ranging device starts；
After fault occurs, the traveling wave ranging device at trouble point two ends starts.
It is arranged on the traveling wave ranging device of transmission line of electricity both sides, obtain based on satellite letter from time synchronization device for electrical power system
Number Coordinated Universal Time(UTC), its precision is better than 1 microsecond.When line fault, the travelling wave ranging dress at trouble point two ends on transmission line of electricity
Putting collection fault transient information, its sample frequency is more than 1000kHz.After fault terminates, the travelling wave ranging dress at trouble point two ends
Put and the fault message each gathering is uploaded, be uploaded in same background processor, by background processor to trouble point
The fault message at two ends is analyzed.
Step 1003, is processed to fault waveform, decomposes different frequency components.
After background processor receives the transmission line malfunction transient information of traveling wave ranging device upload at trouble point two ends,
According to the frequency range of fault transient information, fault transient information is divided into different frequency components.
By fault transient information is divided into different frequency components by the frequency range of fault transient information so that fault transient
Both-end distance measuring result is carried out accurately by wave distortion and the difference of transmission speed that in row ripple, different frequency causes due to frequency dispersion
Correction, thus eliminate owing to the wave head time judges range error that is inaccurate and that introduce.
Step 1004, corrects the two ends time according to each frequency component；
Background processor is according to the different frequency component obtaining in step 1003, and calculates it in transmission of electricity according to each frequency component
During the arrival of the initial time label of transmission speed on circuit, transmission time and fault transient information and each frequency component
Between, the time of two end signals is corrected.
By the difference to frequency component spread speed on the line each after transmission line malfunction, analyze two ends, road fault letter
The otherness of each frequency component arrival time in number, comprehensive each frequency component arrival time, carries out essence to the time at fault two ends
Really synchronization.
Step 1005, it is judged that each frequency component waveform wave head time；
Background processor is according to the time of two end signals after correction in step 1004, the wave head initial time to each frequency component
Demarcate.
By the difference to component attenuation characteristic on the line variant after transmission line malfunction, respectively to different frequency
Component waveform individually analyzes judgement, identifies the initial time of fault waveform.
Step 1006, calculates the corresponding fault distance of each frequency component；
Background processor is according to obtaining in time of two end signals after the correction obtaining in step 1004 and step 1005
Calibrated wave head initial time, the simultaneously spread speed in transmission line of electricity according to total track length and each frequency component, at calculating
The fault distance of corresponding each frequency component,
Step 1007, generates fault localization result；
Background processor draws unique line fault range measurement.
The above, be only presently preferred embodiments of the present invention, is not the restriction making other forms to the present invention, appoints
What those skilled in the art changed possibly also with the technology contents of the disclosure above or be modified as equivalent variations etc.
Effect embodiment.But every without departing from technical solution of the present invention content, the technical spirit of the foundation present invention is to above example institute
Any simple modification, equivalent variations and the remodeling made, still falls within the protection domain of technical solution of the present invention.
Claims (5)
1. the travelling wave ranging auto-correction method of a transmission line malfunction, it is characterised in that：Comprise the steps：
Step a, traveling wave ranging device starts according to Booting sequence, and is uploaded to the fault transient information of transmission line of electricity at backstage
Reason device；
Step b, background processor receives the transmission line malfunction transient information that the traveling wave ranging device at trouble point two ends uploads
After, according to the frequency range of fault transient information, fault transient information is divided into different frequency components；
Step c, background processor is according to the different frequency component obtaining in step b, and joins according to the transmission of each frequency component
Number and time parameter, be corrected to the time of two end signals；
Step d, the wave head of each frequency component, according to the time of two end signals after correction in step c, is initiateed by background processor
Time is demarcated；
Step e, background processor is according to obtaining in time of two end signals after the correction obtaining in step c and step d
Calibrated wave head initial time, the simultaneously spread speed in transmission line of electricity according to total track length and each frequency component, at calculating
The fault distance of corresponding each frequency component；
Step f, background processor draws line fault range measurement.
2. the travelling wave ranging auto-correction method of transmission line malfunction according to claim 1, it is characterised in that：Step a
Described in flow startup be：When line fault, on transmission line of electricity, to carry out fault temporary for the traveling wave ranging device at trouble point two ends
State intelligence sample；After fault terminates, the fault message that the traveling wave ranging device at trouble point two ends obtains each sampling is carried out
Upload, be uploaded in same background processor.
3. the travelling wave ranging auto-correction method of transmission line malfunction according to claim 2, it is characterised in that：Carry out institute
During the fault transient intelligence sample stated, sample frequency is more than 1000kHz.
4. the travelling wave ranging auto-correction method of transmission line malfunction according to claim 1, it is characterised in that：Step c
Described in transmission parameter be that each frequency component calculates its transmission speed on transmission line of electricity and transmission time.
5. the travelling wave ranging auto-correction method of transmission line malfunction according to claim 1, it is characterised in that：Step c
Described in time parameter be arrival time of the initial time label of fault transient information and each frequency component.
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| CN201610886431.1A CN106443348A (en) | 2016-10-11 | 2016-10-11 | Power transmission line fault travelling wave fault location automatic correction method |
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| CN201610886431.1A CN106443348A (en) | 2016-10-11 | 2016-10-11 | Power transmission line fault travelling wave fault location automatic correction method |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6255570A (en) * | 1985-09-04 | 1987-03-11 | Showa Electric Wire & Cable Co Ltd | Location of fault point for cable line |
| CN101509949A (en) * | 2009-03-20 | 2009-08-19 | 华南理工大学 | Direct current transmission line double-end asynchronous and parameter self-adapting fault distance measuring time-domain method |
| CN102565627A (en) * | 2012-01-17 | 2012-07-11 | 上海交通大学 | Double-end distance measurement method for improving wavelet transform based on windowing |
| CN102901911A (en) * | 2012-11-07 | 2013-01-30 | 陆宇平 | Double-locating high-precision distribution network voltage travelling wave measurement system and method |
| CN103941151A (en) * | 2014-04-03 | 2014-07-23 | 昆明理工大学 | Radiation net fault location method by means of zero mode and aerial mode time difference independent of double-end synchronization and with matching of magnitude of voltages and magnitude of currents |
-
2016
- 2016-10-11 CN CN201610886431.1A patent/CN106443348A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6255570A (en) * | 1985-09-04 | 1987-03-11 | Showa Electric Wire & Cable Co Ltd | Location of fault point for cable line |
| CN101509949A (en) * | 2009-03-20 | 2009-08-19 | 华南理工大学 | Direct current transmission line double-end asynchronous and parameter self-adapting fault distance measuring time-domain method |
| CN102565627A (en) * | 2012-01-17 | 2012-07-11 | 上海交通大学 | Double-end distance measurement method for improving wavelet transform based on windowing |
| CN102901911A (en) * | 2012-11-07 | 2013-01-30 | 陆宇平 | Double-locating high-precision distribution network voltage travelling wave measurement system and method |
| CN103941151A (en) * | 2014-04-03 | 2014-07-23 | 昆明理工大学 | Radiation net fault location method by means of zero mode and aerial mode time difference independent of double-end synchronization and with matching of magnitude of voltages and magnitude of currents |
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Application publication date: 20170222 |